Downloader.JFR

It allows to get into the affected computer.
It causes the slowdown of the system, preventing planned tasks from being carried out.
It opens one or more ports to allow remote access to the computer.
It downloads files from several websites.
It spreads
, across the Internet.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:

June 17, 2006

Detection updated on:

June 17, 2006

Statistics

No

Brief Description

Downloader.JFR is a Trojan, which although seemingly inoffensive, can actually carry out attacks and intrusions.

It affects productivity, preventing tasks from being carried out:

In the affected computer:
causes system slowdowns.

It reduces the security level of the computer:
it opens one or more ports to allow remote access to the computer and takes action that compromises user confidentiality.

Downloader.JFR accesses several websites to download files, which it then runs. These can be any type of file, although they are normally malware.

Downloader.JFR uses the following propagation or distribution methods:

Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.

Via Internet, exploiting remote vulnerabilities: attacking random IP addresses, in which it tries to insert a copy of itself by exploiting one or more vulnerabilities.